Firefox Support Forum

Greetings. Lately, I am unable to log-in to some websites. This has started recently, about a few short weeks ago. The Social Security Administration and Electronic Design (magazine) are just a couple of example. I don't get much information from either of the sites. Electronic Design just replies with unable to log-in The SSA site replies with:

"Bad Request Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit."

I cleared the cache, and reinstalled the latest version, Firefox 120.0.1, 64 I am on Windows 10 Pro 64, latest update AMD Ryzen 7 8-core 16GB RAM 1TB Samsung m.2 2280 system disk

Note: I have no issue logging in to the SSA website using MS Edge, but I'd rather use Firefox, which has been my default browser since Adam & Eve hit the earth! Your assistance would be appreciated. Thank you. Sam H. Electrical Engineer (248)677-1039

Hello, every once in a while Firefox on my Win 10 PC resets bookmarks, logins and saved tabs to ones that I used several weeks/months ago. I also remember that it once switched back to a newer instance a few days after switching to and older one. When I try to open the app, it also creates a new icon on my taskbar. This has happened around 4-5 times in the last year. Does any one have an idea what the problem might be? Thanks in advance!

whenever I am on Amazon.com the search window constantly fills with "solo con tu pareja," a movie I once watched. When searching for an item and even when trying to buy something the search window constantly fills with this phrase. This only happens using Firefox browser I've tried clearing cache, re-setting, etc. and while I got it to stop once, as soon as I re-started computer the problem came back.

I know this is likely to be a wont-fix resolution, but I'd like to confirm that.

So if a webserver has the extremely cautious content-security header:

content-security-policy default-src 'none';

Firefox will correctly not embed video from that same domain in web pages hosted by that domain.

Fine. Good. Totally right.

When the server sets the same flag on the media file itself, Firefox's media player won't play it in browser. Even if I directly open the URL as a user, signaling my user intent to accept the risks for the file, the default player Firefox creates uses the media file's content-security-policy FOR itself.

This means the media won't load, gives an unhelpful and incorrect error message about MIME types, and the only way to view it is to actively download it and view it in local media applications.

Now, given the risks of allowing exceptions in CSP, I will understand if the development team doesn't feel this is a safe change to make, and it's on website owners to prevent this, but I don't feel it's in keeping with the intent of CSP to prevent this case.

I have been accessing my Virgin media account for years from the Firefox browser. I like to access my email from Firefox. But now it won't work. However I can get into Virgin media straightforwardly from Microsoft Edge. I've tried clearing the cache (though I don't know if I did correctly) but it's made no difference to the Virgin problem.

I have installed Mozilla Firefox 120.0.1 on Ubuntu 22.0.4 server as a root user and can launch but when I login into another user the browser gives me the error message "Your Firefox profile cannot be loaded. It may be missing or inaccessible"

Please help me how enable Firefox browser for all Linux users

In the last few months, when clicking on the file icon to download a PDF, the "save as" dialog box does not show up fully and I have to view all windows then click on any open window for the dialog box to appear.

I am on a Mac desktop, running MacOS Monterey 12.6.5 I just updated Firefox, to 120.0.1

I attached an image of what the screen looks like after I click the file icon (top right) to download a PDF. It only shows the "Format" part of the "save as" dialog box until I zoom out to view all the windows then have to click on any open window, then the full dialog box will allow me to choose a location to save and rename.

Any help if this a Firefox issue or a Mac issue?

Hello to everybody, My question: Opening local .mdb files (MS Access database) does no longer work in Firefox 120, but was ok in previous releases. The only choice is to save the file rather than onening it with MS access. Under Firefox settings/applications the file type .mdb does not appear. If I answer the question "What should Firefox do with other files?" with "Ask whether to open or save files" it has no effect at all. I expect to find an entry for .mdb files where to choose "always ask" as was the case earlier. Please help!

Regards Volker Zipp

We write an SDK that needs to detect what subdomain a site is running on. For example to detect that app.foo.example.com.au and web.foo.example.com.au share example.com.au

In order to do that we check if we can set a cookie on `.au` that fails. Then `.com.au` also fails, then `example.com.au` and that succeeds

This is safe and fast and leaks no information not already available to any JS running in the page.

In most browsers this is fine. In Firefox it is also fine _except_ it logs a warning to the console that a cookie was rejected. This then causes users to open a support ticket with us in order to find out about "the error"

Is it possible for us to suppress this log?

I recently performed a system reset and upon re downloading Firefox I can't seem to find any of my 50+ tabs that I had open previously, all of them I need for one reason or another, history is empty, can anyone please help explain how to get them back in simple steps?

How can I block the dropdown video miniplayer in Firefox 120.0.1 on Windows 11? It doesn't happen in MS Edge.

I've already set the following with no results:

media.autoplay.default = 5 media.autoplay.blocking_policy = 2 media.autoplay.allow-extension-background-pages = false media.autoplay.block-event.enabled = true media.block-autoplay-until-in-foreground = false

Is there a setting that I've missed? Can the miniplayer somehow be blocked using userContent.css? Can the miniplayer be totally removed from Firefox?

Whenever I'm trying to open the AWS accounts I'm getting the below error please help me with it

400 Bad Request

You may have typed the address incorrectly or you may have used an outdated link

Hello

I have a problem with signing in to my youtube account('s) it tells me that i dont have access anymore.

I tried some fixes like clearing cache, history, proxy and other things you can try. But it still doesnt work

account is fine i can login on other browsers but i think firefox is the best one out there so used to it.

anyone know a fix that might help?

Kind regards Collin

I normally have multiple FF windows open on multiple desktops. After a restart all of a sudden every time I create a new desktop, FF duplicates browser. If I open a new FF Window it will automatically appear across all open desktops.

Tried pretty much everything: Multiple restarts Cleared Cache Refresh Firefox General Settings changes

FF 119.01 Monterey 12.6.6

Any thoughts appreciated

Here is the error report i am receiving when i try to load the game. How do i fix this? 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